Belkin PCMCIA F5D6020v2 kernel 2.6 atmel/atmel_cs driver

Hi,

I've got a problem with the Belkin F5D6020v2 PCMCIA card under a 2.6
kernel.  It worked fine under 2.4 using pcmf502re.  I use an up to date
Debian Sid.

Here's what I did :
1) I compiled a 2.6.1 kernel with the atmel driver (atmel/atmel_cs)

2) I modified /etc/pcmcia/atmel.conf to have atmel instead of pcmf502re
:
card "Belkin F5D6020"
  version "Belkin", "11Mbps-Wireless-Notebook-Network-Adapter"
  manfid 0x01bf, 0x3302
  bind "atmel"
#  bind "pcmf502re"

and I added :
device "atmel"
  class "network" module "atmel_cs"

3) I put the card in the slot, the leds become green but no interface is
created.  I hear no pcmcia beep, but cardmgr is loaded.  I see this in
/var/log/syslog :
Jan 12 11:41:54 osiris cardmgr[291]: socket 0: Belkin F5D6020
Jan 12 11:41:55 osiris cardmgr[291]: bind 'atmel' to socket 0 failed:
Invalid argument

-> I don't know where the "invalid argument" comes from...
-> I don't know if I must load a firmware.  I have installed
atmel-firmware 0.2 and the documentation says that the interface (eth1
here) must exist previously to loading the firmware.

4) $ sudo ifconfig eth1 up
eth1: ERROR while getting interface flags: No such device

-> I see no mention of atmel when I do /etc/init.d/hotplug status.
However I see other USB devices (but my wireless card is PCMCIA).

-> I searched google.  Some other people did have the same problem but
no answer was given :
http://lists.infradead.org/pipermail/linux-pcmcia/2003-September/000266.html
http://meganecco.org/rwiki/rw-cgi.rb?cmd=view&name=myn%3A%3A%B2%E1%B5%EE

-> Should I recompile atmelwlandriver-source and avoid the kernel module
?
-> I didn't have to use a firmware loader in 2.4, so is it really
necessary in 2.6 ?
-> When I modprobe atmel and atmel_cs manually, it works, but I still
don't have any interface eth1 created (nothing appears using iwconfig
too) :-(

Any idea ? Thanks for reading this far !

Xavier.